[Test-Equipment] Boonton 42/92BD

[Glenn Little WB4UIV]

I have a 42BD that I wanted to add the autorange board to.
I found a 92BD less probe at a good price that has the aurorange board in it.
I cleaned up my 42BD and installed the autorange board and all is good.
I noticed that the 92BD did not have a chopper and had a different 
board in the chopper driver position.
 From this I guess that, in the later pieces, Boonton replaced the 
mechanical chopper with an electronic chopper.
Does anyone have a 92BD or a 42BD book that can confirm this?
All of the books that I have found online have the mechanical chopper.
If this electronic chopper board will work in a 42BD that has a 
mechanical chopper, I would like to upgrade my 42BD to the electronic chopper.
There is an article available about replacing the chopper driver with 
a home built board to replace the mechanical chopper.
Any help appreciated.

73
Glenn
WB4UIV




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Glenn Little                ARRL Technical Specialist   QCWA  LM 28417
Amateur Callsign:  WB4UIV            wb4uiv at arrl.net    AMSAT LM 2178
QTH:  Goose Creek, SC USA (EM92xx)                      SBE ARRL  TAPR
"It is not the class of license that the Amateur holds but the class
of the Amateur that holds the license"
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